| 1. | They bought a dog to prevent any burglaries .
他们买了条狗以防盗贼。 |
| 2. | The mould is then covered to exclude dust .
然后将模具盖好，以防尘埃。 |
| 3. | Ants store up food against the winter .
蚂蚁储存食物以防冬令。 |
| 4. | You should put a little money aside for a rainy day .
你应储些钱以防不时之需。 |
| 5. | The grounds are fenced in to prevent trespassing .
庭院用栅栏围着以防外人进去。 |
| 6. | He raised his arm to protect his face from the blow .
他抬起胳膊挡住脸，以防挨打。 |
| 7. | Wrong-way movements on the slip road are prevented .
对在岔路上发生行车方向的错误应以防止。 |
| 8. | The stair treads were covered with rubber to prevent slipping .
楼梯踏板上铺了橡皮，以防滑跌。 |
| 9. | The men were ordered to keep watch against interruption .
跟班们奉命担任警戒，以防发生打岔的事。 |
